# Copyright (c) 2026 Krzysztof Rudnicki. MIT licence.
"""Finding the private album, and the two different ways it can be absent.

Split out of test_config.py, which reached the 250-line cap.
"""

from __future__ import annotations

from typing import TYPE_CHECKING

import pytest

from signal_bot.config import ConfigError
from signal_bot.config_env import load_config
from tests import pack_fixture
from tests.test_config import BASE_ENV

if TYPE_CHECKING:
    from pathlib import Path


def test_an_installation_with_no_album_has_no_pack(tmp_path: Path) -> None:
    """Which is every machine but one, and every test in this suite."""
    assert load_config(dict(BASE_ENV)).photo_pack_dirs == ()


def test_a_named_album_is_loaded_and_kept(tmp_path: Path, monkeypatch: pytest.MonkeyPatch) -> None:
    root = pack_fixture.build(tmp_path / "pack")
    monkeypatch.setenv("PHOTO_PACK_DIR", str(root))
    assert load_config(dict(BASE_ENV)).photo_pack_dirs == (root,)


def test_a_named_album_that_is_not_there_fails_startup(
    tmp_path: Path, monkeypatch: pytest.MonkeyPatch
) -> None:
    """A typo in a path is an answer, not an outage worth retrying."""
    monkeypatch.setenv("PHOTO_PACK_DIR", str(tmp_path / "nowhere"))
    with pytest.raises(ConfigError, match="is not a directory"):
        load_config(dict(BASE_ENV))


def test_a_broken_album_fails_startup_rather_than_every_command(
    tmp_path: Path, monkeypatch: pytest.MonkeyPatch
) -> None:
    """Parsed here, where load_config raising exits, not inside a retry loop."""
    root = pack_fixture.build(tmp_path / "pack")
    (root / "people.json").write_text("{}", encoding="utf-8")
    monkeypatch.setenv("PHOTO_PACK_DIR", str(root))
    with pytest.raises(ConfigError, match="defines no commands"):
        load_config(dict(BASE_ENV))


def test_the_album_may_also_be_found_where_systemd_puts_it(
    tmp_path: Path, monkeypatch: pytest.MonkeyPatch
) -> None:
    pack_fixture.build(tmp_path / "state" / "pack")
    monkeypatch.setenv("STATE_DIRECTORY", str(tmp_path / "state"))
    assert load_config(dict(BASE_ENV)).photo_pack_dirs == (tmp_path / "state" / "pack",)


def test_an_empty_album_directory_is_not_a_crash_loop(
    tmp_path: Path, monkeypatch: pytest.MonkeyPatch
) -> None:
    """The tagger creates the directory before the manifest exists.

    With Restart=always, failing on a directory somebody merely created would
    put the unit into a restart loop -- so the implicit path is a hint, and
    only a pack named outright is allowed to fail startup.
    """
    (tmp_path / "share" / "signal-bot" / "pack" / "media").mkdir(parents=True)
    monkeypatch.setenv("XDG_DATA_HOME", str(tmp_path / "share"))
    assert load_config(dict(BASE_ENV)).photo_pack_dirs == ()


def test_a_named_album_with_no_manifest_fails_startup(
    tmp_path: Path, monkeypatch: pytest.MonkeyPatch
) -> None:
    (tmp_path / "pack").mkdir()
    monkeypatch.setenv("PHOTO_PACK_DIR", str(tmp_path / "pack"))
    with pytest.raises(ConfigError, match=r"has no people\.json"):
        load_config(dict(BASE_ENV))